Device Payment Plan Agreement and Wireless Service Receivables - Schedule of Receivables (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts receivable, net	$ 12,308	$ 12,929
Accounts and Financing Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts receivable	24,108	25,332
Less Allowance for credit losses	922	826
Accounts receivable, net of allowance	23,186	$ 24,506
Device payment plan agreement
Financing Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts receivable	12,810
Less Allowance for credit losses	502
Accounts receivable, net	12,308
Wireless service
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts receivable	5,202
Less Allowance for credit losses	188
Accounts receivable, net	5,014
Other receivables
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts receivable	6,096
Less Allowance for credit losses	232
Accounts receivable, net	$ 5,864